What if you don't want a secret admirer?

I don't want to re-invent the wheel on this one. I have read a lot of articles on the topic and I like this one because it is short, well written and to-the-point.

http://www.naturefocused.com/articles/image-protection.html

Please comment with any additional measures photographers can take to help protect their intellectual property.

Additional good background material:

http://enticingthelight.com/2012/05/10/photography-theft-and-how-to-protect-your-work/

http://enticingthelight.com/2012/05/10/stealing-photographers-work-to-start-a-business-exposed/